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8. San Francisco Marathon

Chesapeake Bay Bridge
Lots of marathoners find their heart in San Francisco. July 31 is this year's date. The course is out of a guidebook. It begins on the Embarcadero, passes Fisherman's Warf, the Marina and crosses Golden Gate Bridge. Runners return across the bridge, pass through the Presidio and through... Ellen Creager/Detroit Free Press/MCT